Can Human Wave units exit a board for EVP if the VC allow EVP? I'm assuming that all the other normal criteria for HW is met but units that flow around an existing CC might have enough MP left to exit the board.
Theorem: units participating in a Human Wave can exit offboard.
Lemma: In moving offboard, a unit enters a Location. Per A2.6, "EXIT: Units may leave the mapboard using normal MPh/APh capabilities from any mapboard edge hex or half-hex as if they are entering an imaginary off-board hex..." From the index, "Location (a hex, as well as any of the following sub-divisions of that hex ..." Thus, a unit moving offboard enters an imaginary Location.
Proof: A unit in a Human Wave "
must (if possible) do exactly
one of the following and cannot expend MF for any other reason: move to a Forward Location, ..." [A25.232]. By the lemma, the Human Wave can enter the (imaginary) off-board Location, and the proof is complete.
But unless there had been a really obvious rule stating you couldn't, I would have just taken it for granted that you could.
JR